cookie cutter

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A device for cutting flattened cookie dough into shapes before baking.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun US A device used to cut flattened dough into shapes before baking.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a kitchen utensil used to cut a sheet of cookie dough into desired shapes before baking